Ohio Rev. Code § 6101.06
At the time of filing the petition provided for in section 6101.05 of the Revised Code, or at any time subsequent thereto and prior to the time of the hearing on said petition, a bond shall be filed, with security approved by the judge of the court of common pleas determining the sufficiency of the petition, sufficient to pay all the expenses connected with the proceeding in case the court refuses to organize the conservancy district. If at any time during the proceeding the court is satisfied that the bond first executed is insufficient in amount, it may require the execution of an additional bond within a time to be fixed, which shall be not less than ten days distant, and upon failure of the petitioners to execute such additional bond the petition shall be dismissed.
R.C. § 6101.06